You may have noticed in today's earlier Witcher 2 news the box art for the console version of the game contained the words "Enhanced Edition". Not only will console players be getting new content to make it worthy of this name, but PC players will as well, free of charge assuming they own a previous version.
"New major adventures" taking place in underground Loc Muine, its nearby mountain forest, and a secret cave will be among the content. In total, several hours of additional gameplay can be expected from it. Besides this you get new characters, one of which is an older Temerian noblewoman luxuriously named Brigida Paperbrock Dame, and new animations and cutscenes (including the excellent one below).
Xbox 360 CG opening - YouTube
The new content will be available to just about everyone on console and PC alike April 17.